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WA doctor who killed husband loses appeal

A doctor who killed her abusive husband by beating him with a heavy metal mallet as he slept in their West Australian home has lost an appeal against her conviction and sentence.

Sri Lankan-born Chamari Liyanage was sentenced to four years in prison after being convicted of the manslaughter of Dinendra Athukorala in Geraldton, in the state's Mid West region, in June 2014.

Dr Liyanage and her husband were doctors at Geraldton Regional Hospital, having come to Australia from Sri Lanka in 2011.

But she said he was a violent and controlling husband who forced her to participate in his sexual acts with other women, made her perform sexual acts in front of a web camera and implied threats to harm her family.

He also made her watch pornography during sex, much of which showed child abuse, and at the time of his death was grooming a 17-year-old girl to engage in sexual activity with them.

Dr Liyanage, who made the call to emergency services, maintained that she had no memory of what happened.

A jury acquitted Dr Liyanage of murder but found her guilty of manslaughter.

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During her time behind bars, Dr Liyanage had her visa cancelled but following community support, was later told she would not be deported once she was released on parole, which happened in March.

Dr Liyanage took her case to the WA Court of Appeal, claiming that in regards to her conviction the trial judge erred in excluding evidence her counsel sought to adduce from a social worker about domestic violence.

She also argued the judge erred in admitting photographs of the victim's body as it was found and alleged there were errors in the judge's directions to the jury.

In the appeal against her sentence, Dr Liyanage claimed the sentence was manifestly excessive and the judge erred in giving weight to the fact she did not offer to plead guilty to manslaughter.

But the court ruled unanimously on Thursday that none of the alleged errors had been established and the appeal should be dismissed.

"The sentence imposed was of a significantly lesser term than the sentences usually imposed for the offence of manslaughter, even in the presence of significant mitigating factors," the judges said.

"The sentence is not arguably manifestly excessive, either as to the type of sentence or the length of the term of immediate imprisonment which was imposed."